Baker Oil Tools Unit No.

4413 Date: April 23, 2004

Rev. A Page: 1 of 16
REMEDIAL SYSTEMS Drillable Bridge Plugs
TECHNICAL UNIT

N-1™ and NC-1™ Bridge Plugs and Wireline Adapter Kit

Product Family Nos. H40120, H40122, H40121, H40123, H43824, and H43825

Introduction
The N-1™ and NC-1™ Bridge Plugs are high
performance drillable bridge plugs, commonly
used for zonal isolation during stimulation or ce-
menting jobs, or for temporary and permanent
abandonments.
The N-1™ can easily be converted to a K-1™
Cement Retainer or a NC-1 Bridge Plug. The NC-
1 is a modified N-1 Bridge Plug for use primarily in
gas well applications. The design of the NC-1 al-
lows the upper portion of the body and the bridging
plug to be drilled out, permitting pressure equaliza-
tion across the tool before drilling out the upper
slips. A shear ring mechanism is used to minimize
the amount of material to be drilled out by the cen-
ter of the drill bit.

Features/Benefits
• Choice in setting - Wireline, mechanical, and
hydraulic
• High performance - 10,000 psi and 400°F in
most sizes (see Specification Guide)
• Superior running characteristics - Increased
clearance and locked construction for faster,
safer run-in with packing element locked
against swab-off forces
• Body lock ring - Traps setting force in element
to maintain pack-off during pressure reversals
• Adaptable - N-1 and NC-1 Bridge Plugs consist
of a basic unit which can easily be converted to
mechanical or wireline set or to a K-1 Cement
Retainer N-1™, NC-1™,
Sizes 1AA-5AA Sizes 1AA-5AA
Wireline Set Drawing No. 760-577 Drawing No. 760-579
N-1 Wireline Set Bridge Plug, H40120
NC-1 Wireline Set Bridge Plug, H40121
Mechanical Set
N-1 Mechanical Set Bridge Plug, H40122
NC-1 Mechanical Set Bridge Plug, H40123

This document is and contains unpublished, copyrighted and confidential information of Baker Hughes, and is revealed for limited purposes only. This document
is the property of Baker Hughes and is to be returned to Baker Hughes on request and may not be reproduced, used or disclosed to persons not having a need to
know consistent with the purpose of the document, without the written consent of Baker Hughes. This document is not rented, loaned or sold, either alone ore in
conjunction with equipment or product. © 7/19/04 Baker Hughes Incorporated.
Unit No. 4413 4-23-04 N-1™ and NC-1™ Bridge Plugs and
Rev. A Page 2 of 16 Wireline Adapter Kit

WARNING
Use of Baker equipment contrary to
manufacturer’s specification may result in
property damage, serious injury or fatality.

Specification Guide
Preferred Casing Temperature
Casing/Tubing Tool Differential
ID Range Rating (°F)
Pressure
OD Wt Max OD Min Max
Size (psi) 70 HD 90 HD
(in.) (lb/ft) (in.) (in.) (in.)
4-1/2 9.5-16.6 1AA 3.593 3.826 4.090
5 11.5-20.8
1BB 3.937 4.154 4.560
26.0-32.3
5-1/2
14-23 2AA 4.312 4.580 5.044
6 18-26
2BB 4.937 5.140 5.552
7 49.5
6-5/8 20-32
3AA 5.410 5.595 6.135 10,000
32-44
7
17-35
3BB 5.687 6.000 6.538
45.3
7-5/8
20-39
4AA 6.312 6.625 7.125
7-3/4 46.1
8-5/8 24-49
5AA 7.125 7.511 8.097
8-3/4 49.7 up 125
9-5/8 32.3-58.4 to to
9-3/4 59.2 6AA 8.125 8.435 9.063 8,000 225 400*
9-7/8 62.8
60.7-81 6BB 9.000 9.250 9.660
10-3/4 5,000
32.75-60.7 7AA 9.437 9.660 10.192
60.0-83.0 7BB 9.937 10.192 10.772
11-3/4 4,000
42-60 8AA 10.437 10.772 11.150
85-102 8BB 11.562 11.633 12.159
13-3/8
48-80.7
3,000
13-1/2 81.4 9AA 12.000 12.175 12.715
13-5/8 88.2
V150 2,500
109.0-146.0 11AA 13.915 14.000 14.750
P110 2,000
16
N80 1,450
55.0-84.0 11BB 14.585 14.700 15.400
J55 1,000
* For geothermal applications (no hydrocarbons present), a special “500°F Thermal Service” element is available for most
sizes of N-1 Bridge Plugs. It has been successfully run in steam wells up to 500°F.
 Unit No. 4413 4-23-04 N-1™ and NC-1™ Bridge Plugs and
Rev. A Page 4 of 16 Wireline Adapter Kit

Operating Instructions Suggested Rotary Operation

The N-1 Wireline Set Bridge Plug (Product 1. A Junk Basket (Product Family No. H42802)
Family No. H40120) is set using a E-4™ Wireline should be installed in the drilling string in order
Pressure Setting Assembly (Product Family No. to trap cuttings. This will serve two purposes.
H43702) and a Wireline Adapter Kit (Product Fam- a. It will help to eliminate the condition of con-
ily No. H43824). The N-1 Wireline Set Bridge Plug tinuing to drill on the same loose material.
may be set hydraulically using a CT™ Hydraulic b. It will trap cuttings that might cause trouble
Setting Tool, (Product Family No. H40062) a J™ during subsequent operations in the well.
Hydraulic Setting Assembly (Product Family No. 2. A new, high quality, medium hard formation
H41371) or using a combination hydraulic/tension rock bit with medium to short, regularly spaced
setting method using a Bridge Plug Hydro-Set Set- teeth such the Hughes WO should be used. Se-
ting Tool (Product Family No. H40174). Consult lect a bit that will not “track,” and of a size that
the appropriate setting tool tech unit for further in- will give minimum clearance between the bit
structions. and the casing. It is recommended that bits with
The N-1 Mechanical Set Bridge Plug (Product “wings” between the outer teeth not be used.
Family No. H40122) is set using a modified K-1 3. Circulating down the drillpipe or tubing will al-
Mechanical Setting Tool (Product Family No. low larger pieces of the tool to be circulated up
H40069). Consult the K-1 Tech Unit for further in- into the junk basket rather than reverse circulat-
structions. ing. This will usually result in faster drill out.
The NC-1 Wireline Set Bridge Plug (Product 4. When feeling for the tool, try to avoid any im-
Family No. H40121) is set using a E-4 Wireline pact which might break some of the teeth on the
Pressure Setting Assembly (Product Family No. bit. Experience has shown that rotary speeds
H43702) and a Wireline Adapter Kit (Product Fam- between 50 and 75 rpm will give the best re-
ily No. H43825). Alternatively, the NC-1 can be set sults under normal conditions.
using standard hydraulic setting tools. 5. Gradually set down 5,000 lb on the tool and drill
for 5-10 minutes. Drill up the mandrel which ex-
The NC-1 Mechanical Set Bridge Plug (Product
tends above the slips and allow the bit to seat
Family No. H40123) is set using a NC-1 Mechani-
on the full diameter. Gradually increase set
cal Setting Tool (Product Family No. H40066)
down weight to about 2,000 lb per inch of bit di-
which is a modified K-1 Mechanical Setting Tool
ameter. If the rate of penetration drops, in-
(Product Family No. H40069). Consult the NC-1
creased weight, or varying the speed should be
Tech Unit for further instructions.
tried until the rate of penetration picks up.
Recommended Drill Out Procedures Conversion Procedures
For N-1™ and NC-1™ Bridge Plug
The “Basic Unit” Drawing Nos. 333-825 and
If conditions are normal and the instructions 333-826 must be obtained before conversion to
shown below are followed, N-1 Bridge Plugs are any one of the products listed in the following pag-
relatively easy to drill up. The materials used in this es can be accomplished. To obtain the “Basic
product must satisfy strict quality control specifica- Unit,” disassemble the parts from the tool to be
tions and are designed to break up into small piec- converted.
es during the drilling-out operation.
It is nearly impossible to cover all the problems How To Obtain A “Basic Unit” From:
that may arise under every condition; however, K-1™ Cement Retainer, Product Family
there are certain procedures that can be followed Nos. H40021, H40022, H40023, and H40024
in most instances. Thus the recommendations list- 1. Loosen Set Screw in Guide. Set Screw extends
ed below should be used as a guide only and, un- through Body into the Guide on Sizes 6AA and
der conditions other than normal past experience larger.
and common sense should govern the drilling-out
operation.
N-1™ and NC-1™ Bridge Plugs and Unit No. 4413 4-23-04
Wireline Adapter Kit Rev. A Page 5 of 16

2. Remove Guide and Lower Slip (Sizes 1AA- N-1™ Bridge Plug,
5AA). DO NOT DROP LOWER SLIP. Product Family No. H40120
a. Use the appropriate Cement Retainer Ten- 1. Loosen Hex Soc Set Screw and remove Guide.
sion Mandrel. Insert the Tension Mandrel 2. Remove N™ Bridging Plug, and for Sizes 1AA-
into the Body. Strike the exposed end of the 5AA only, remove Belleville Washers.
Tension Mandrel with a hammer and block of
wood to push the Latch Sleeve, Seal Spacer NC-1™ Bridge Plug,
Product Family No. H40121
and Seal out of the Retainer.
1. Remove Hex Soc Set Screw and remove
b. For Cement Retainer with Flapper Valve: Re- NC-1 Type Bridging Plug.
move Guide Assembly with Flapper Valve.
2. Loosen Hex Socket Set Screw and remove
Guide and Belleville Washers.

“Basic Unit” Conversion

Drawing No. 333-825, Sizes 1AA-5AA

Drawing No. 333-826, Sizes 6AA-11BB

N-1™ and NC-1™ Bridge Plugs and Unit No. 4413 4-23-04
Wireline Adapter Kit Rev. A Page 9 of 16

To Convert to a NC-1™ Bridge Plug Mechanical Bridge Plug, Gas Well Type,
Product Family No. H40123
Assembly Drawing No. 999-602

Use “Basic Unit” and Parts Listed below.

NOTE: Be sure that the correct Mechanical Upper Slip (1) is used. Refer to Parts List for Material Number. A Shear
Ring is shipped with each NC-1 Plug.
1. Thread Guide on Body and tighten Set Screw. Lower Slip should be tight.
2. Install Model NC-1 type Bridging Plug with O-ring into the TOP END of body.
3. Align tapped hole in Body with a hole in the NC-1 Bridging Plug. Install Hex Soc Set Screw.

Parts List, Sizes 1AA - 11BB

Refer to Drawing No. 999-602.
Item No. Size and Material No.
Description
No. Req’d 1AA 1BB 2AA 2BB 3AA 3BB 4AA 5AA
1 Mechanical Upper Slip 1 H03-55519-04 H03-55519-05 H03-55519-06 H03-55519-07 H03-55519-03 H03-55519-00 H03-55519-08 H03-55519-09
2 NC-1 Bridging Plug 1 H07-53754-00 H07-53755-00 H07-57490-00
3 O-ring (For Item 2) 1 Ref HWW-B215-H40 HWW-B224-H40
H03-44260-00 H03-44250-00 H03-44256-00 H03-44258-00 H03-44262-00 H03-44259-00
4 Bridge Plug Guide ∆ 1 H01-74802-01♦ H01-75862-01♦
H01-74796-01♦ H01-74797-01♦ H01-74798-01♦ H01-74799-01♦ H03-44261-00♦ H01-74801-01♦
Hex Soc Set Screw HWW-G51B-0D0 HWW-G51B-0S0
5 1
(For Item 4) (5/16 - 18 X 3/8 lg) (5/16-18 x 3/4 lg)

Item No.
Description 6AA 6BB 7AA 7BB 8AA 8BB 9AA 11AA 11BB
No. Req’d
1 Mechanical Upper Slip 1 H03-55519-01 H03-55519-10 H03-55519-11 H03-55519-12 H03-55519-13 H03-55519-14 H03-55519-02 H07-58903-00 H07-58904-00
2 NC-1Bridging Plug 1 H07-57491-00
3 O-ring (For Item 2) 1 Ref HWW-B224-H40
H02-07892-00 H01-75852-00 H01-75852-00
4 Bridge Plug Guide ∆ 1
H02-07830-01♦ H01-74804-01♦ H01-74804-01♦
Hex Soc Set Screw HWW-G51H-1H0 HWW-G51H-100
5 1
(For Item 4) (1/2-13 X 1-1/2 lg) (1/2-13 X 1 lg)
∆ If Bridge Plug Guide is not available, a Cement Retainer Guide may be used.
♦ Cement Retainer Guide.
Unit No. 4413 4-23-04 N-1™ and NC-1™ Bridge Plugs and
Rev. A Page 10 of 16 Wireline Adapter Kit

N-1™ and NC-1™ Bridge Plugs

Dimensional Data Drawing No. 333-828, Sizes 1AA - 5AA

Dimensional Data Drawing No. 760-578, Sizes 6AA - 11BB

Dimensional Data, Sizes 1AA - 11BB

Refer to Drawing Nos. 333-828, Sizes 1AA - 5AA and 760-578, Sizes 6AA - 11BB.
Size
Dim
1AA 1BB 2AA 2BB 3AA 3BB 4AA 5AA 6AA 6BB 7AA 7BB 8AA 8BB 9AA 11AA 11BB
A 3.593 3.937 4.312 4.937 5.410 5.687 6.312 7.125 8.125 9.000 9.438 9.937 10.437 11.562 12.000 13.900 14.570
B 3.500 3.812 4.265 4.812 5.370 5.625 6.187 7.062 8.000 8.880 9.312 9.812 10.317 11.500 11.875 13.775 14.462
C 3.515 3.812 4.218 4.812 5.250 5.625 6.187 7.062 8.000 8.875 9.312 9.810 10.312 11.500 11.875 13.770 14.460
D 3.593 3.937 4.312 4.937 5.410 5.687 6.312 7.125 8.125 9.000 9.438 9.937 10.437 11.562 12.000 13.900 14.570
E 3.484 3.812 4.250 4.812 5.250 5.625 6.187 7.062 8.000 8.875 9.312 9.804 10.312 11.500 11.875 13.775 14.462
F 3.594 3.937 4.312 4.937 5.410 5.687 6.312 7.125 8.129 9.000 9.437 9.937 10.437 11.562 12.000 13.900 14.570
G 1.345 2.000
H 2.500 2.625 2.875 3.750 4.375 6.248 7.375 8.250 9.625 12.000
J 2.625 2.750 3.000 3.937 4.625 6.375 7.500 8.375 9.750 12.250
K 0.59 0.47 0.760 1.270 1.230 1.531 1.300 1.250 1.375
L 3.630 3.310 4.125 4.656 4.375 4.656 4.625 4.687 4.720
M 9.190 9.280 10.093 10.625 10.670
N 12.590 13.660 16.187 16.343 16.250 16.937 17.280
P 17.340 17.470 17.153 17.590 18.535 21.466 21.191 21.062 21.218 21.125 21.812 22.155
P♦ 19.562 19.644 19.546 21.422 21.406 21.296 22.350 22.860 22.850 22.875
♦ Overall Length with Cement Retainer Guide Non-Threaded. (Not Shown)